Related Experiment Video
Updated: Feb 27, 2026

Recording of Inward Rectifying K+ Currents in Freshly Isolated Basilar Artery Smooth Muscle Cells by Patch Clamp Technique
Published on: February 7, 2025
[Potassium and blood pressure, an old story, revisited]
Sofia Zisimopoulou1, Antoinette Pechère-Bertschi2,3, Michel Burnier4
1Service de médecine de premier recours, Département de médecine communautaire, de premier recours et des urgences, HUG, 1211 Genève 14.
Abstract:
Food in industrialized countries is rich in processed products with a high sodium and low potassium content. There is abundant evidence in the literature depicting the relationship between a high daily sodium/potassium intake ratio and the high prevalence of arterial hypertension in modern societies. There is also increasing evidence suggesting a blood pressure lowering effect of potassium, especially in cases of high sodium intake or in patients with increased salt sensibility. Our dietary advice for the prevention and treatment of hypertension should follow a thorough evaluation of our patients' daily nutritional habits and should not only focus on sodium intake but also aim for a balanced sodium/potassium uptake.
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The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
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Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.

